An IRS payment plan is not free money. It costs you in three ways: a setup fee (the IRS calls it a user fee), interest on the unpaid balance, and the failure-to-pay penalty, which keeps running until the balance is paid. The good news is that the choices you make when you set up the plan can lower each of them.
Setup fees (user fees)
The current fees took effect July 5, 2026 (IRM 5.14.1.2). They depend on two things: whether you apply online or with help from IRS staff, and whether you pay by direct debit from a bank account.
| How the plan is set up | User fee |
|---|---|
| Online, with direct debit | $29 |
| Online, without direct debit | $69 |
| With IRS staff (phone, mail or in person), with direct debit | $107 |
| With IRS staff (phone, mail or in person), without direct debit | $178 |
| Low-income taxpayer | $43, waived with direct debit, otherwise reimbursed when the plan is completed |
| Reinstating or restructuring a plan | $89 (lower online for low-income taxpayers) |
| Short-term payment plan (up to 180 days) | No fee |
Source: IRM 5.14.1.2 for installment agreement fees, and IRM 5.19.1.6.4.6 for short-term plans. Fees can change, so confirm the current amounts on IRS.gov before you apply.
The difference is real. Applying online with direct debit costs $29. Calling and paying by check costs $178. If you can use the online tool, it usually pays to do so. See how to apply for a payment plan.
The low-income fee rule
Internal Revenue Code section 6159(f) protects lower-income taxpayers. If your adjusted gross income is at or below 250% of the federal poverty level, there is no fee if you pay by electronic debit. Otherwise, the fee is refunded when you complete the plan. The IRM adds that if your plan is terminated, you forfeit that reimbursement (IRM 5.14.1.2).
Short-term plans have no fee
A short-term payment plan gives you up to 180 days to pay in full. It is not an installment agreement, so there is no user fee (IRM 5.19.1.6.3; IRM 5.19.1.6.4.6). If you can pay within six months, read short-term payment plans. Just know that the failure-to-pay penalty is not reduced under a short-term plan.
Interest
Interest keeps running on your unpaid balance until it is paid. Penalties and interest keep accruing during any installment agreement (IRM 5.14.1.1.1).
- The rate. The underpayment interest rate under Internal Revenue Code section 6621 is 7% per year for October 1 through December 31, 2026 (Rev. Rul. 2026-15).
- It compounds daily. Internal Revenue Code section 6622 requires daily compounding.
- It can change every quarter. The rate resets quarterly, so the rate you pay next year may be different.
Interest cannot be avoided by setting up a plan. The only way to reduce it is to pay the balance down faster. Every extra dollar you pay early stops interest on that dollar.
The failure-to-pay penalty
The failure-to-pay penalty is where your choices make the biggest difference. Under Internal Revenue Code section 6651(a)(2), the standard rate is 0.5% of the unpaid tax for each month or part of a month, up to a maximum of 25%. But the rate can be lower or higher depending on your situation.
| Monthly rate | When it applies | Source |
|---|---|---|
| 0.25% | You are an individual, you filed your return on time (including extensions), and an installment agreement is in effect. Applies only if no CP504, LT11 or Letter 1058 was issued, and reverts if the agreement terminates. | IRC 6651(h); IRM 5.14.1.2 |
| 0.5% | The standard rate on unpaid tax | IRC 6651(a)(2) |
| 1% | Beginning 10 days after the IRS gives notice of intent to levy under section 6331(d). The CP504 is that notice. | IRC 6651(d) |
The penalty is capped at 25% of the unpaid tax in total (section 6651(a)(2)).
What this means for you
- Set up the plan early. If you filed on time and get an installment agreement in place before the IRS sends a CP504, LT11 or Letter 1058, you may qualify for the 0.25% rate. Once one of those notices goes out, the reduced rate is no longer available (IRM 5.14.1.2).
- A CP504 doubles the rate. Under section 6651(d), the rate goes to 1% per month beginning 10 days after that notice.
- Do not default. If your plan terminates, the reduced rate reverts (IRM 5.14.1.2). See what happens if you miss a payment.
The failure-to-file penalty is bigger
If you have not filed yet, file on time even if you cannot pay. Under Internal Revenue Code section 6651(a)(1), the failure-to-file penalty is 5% of the unpaid tax per month, up to 25%. That is ten times the standard failure-to-pay rate. Filing on time also keeps the door open to the 0.25% rate during a plan. If you have older unfiled years, read unfiled returns before a payment plan.
Refunds and your balance
During any installment agreement, future federal refunds are applied to your balance. They do not replace your monthly payment (IRM 5.19.1.6.4.16; IRM 5.14.1.4.2). A refund applied to your balance does lower the amount that interest and penalties are charged on.
Ways to keep the total cost down
- File every return on time, even if you cannot pay.
- Apply online and choose direct debit if you can.
- Set up the plan before a CP504 or final notice arrives.
- Pay as much as you can each month. Use the payment plan calculator to compare payment amounts.
- If you can pay within 180 days, consider a short-term plan with no fee.
- Do not miss payments. Reinstating a plan costs $89, and default can bring back the higher penalty rate.
If you may qualify for penalty relief, or if a plan is not affordable at all, compare your options in owe the IRS but cannot pay and offer in compromise or payment plan.
Getting help
The order in which you file, apply and pay can change what your plan costs. If you have a large balance, unfiled years, or a notice you are not sure about, talk to a tax attorney before you set up a plan. You can reach our office through GetIRSHelp.com or at (813) 229-7100.
Frequently asked questions
How much does it cost to set up an IRS payment plan?
As of the fees effective July 5, 2026, an online plan with direct debit costs $29, online without direct debit costs $69, a staff-assisted plan with direct debit costs $107, and a staff-assisted plan without direct debit costs $178 (IRM 5.14.1.2). Fees can change, so confirm on IRS.gov.
Is there a fee for a short-term payment plan?
No. A short-term payment plan of up to 180 days is not an installment agreement, so there is no user fee (IRM 5.19.1.6.4.6). The failure-to-pay penalty is not reduced under a short-term plan.
What interest rate does the IRS charge on a payment plan?
The underpayment rate under section 6621 is 7% per year for October 1 through December 31, 2026 (Rev. Rul. 2026-15). It compounds daily under section 6622 and can change each quarter.
Does a payment plan lower the failure-to-pay penalty?
It can. Under section 6651(h), an individual who filed on time pays 0.25% per month instead of 0.5% for months an installment agreement is in effect. The IRM says this applies only if no CP504, LT11 or Letter 1058 was issued, and it reverts if the plan terminates.
Why did my failure-to-pay penalty go up to 1%?
Under section 6651(d), the rate increases to 1% per month beginning 10 days after the IRS gives notice of intent to levy under section 6331(d). The CP504 is that notice.
Can low-income taxpayers get the fee waived?
Yes. If your adjusted gross income is at or below 250% of the federal poverty level, section 6159(f) waives the fee if you pay by electronic debit, and otherwise refunds it when you complete the plan.
This guide is general information, not legal advice. Tax law changes and every case turns on its own facts.